These are by artist Eric Langert. Aren't they brilliant?! I want at least one for my front yard. maybe it would keep people from walking through it or parking on my lawn on the way to football games An UPDATE on the artist...He lives in Sweden and is fairly famous. He has many unique and wonderful exhibits, you can see many at his website here http://www.langert.se/. You will have to contact him directly for more information.
Early Ford V8 Metal Art Symbol Welded Old Engine Parts | Etsy
This is an early model Ford V8 symbol I welded up using a real piston, valves and wheel bearings. It stands 9 inches tall and is very sturdy.